You are the Cisco Network Designer in Cisco.com. Which of these is a Layer 2 transport architecture that provides packet-based transmission optimized for data based on a dual ringtopology?()
- A、 Dynamic Trunking Protocol
- B、 Resilient Packet Ring
- C、 Synchronous Digital Hierarchy
- D、 Coarse Wave Division Multiplexing
正确答案:B
答案解析:有

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